refactor: 문서 개선 중

docs/virtualization/final/assets/diagrams/qemu-block-backend-forms/qemu-block-backend-forms.mmd

@@ -0,0 +1,14 @@
+%% virtqueue 뒤 QEMU block backend의 세 형태
+%% question: Guest /dev/vda 요청이 VM boundary를 넘은 뒤 QEMU에서 qcow2, RAW, Host block device 중 어느 backend로 이어지는가
+flowchart LR
+    n0[("/dev/vda")]
+    n1["virtio-blk · virtqueue"]
+    n2["QEMU block backend"]
+    n3[("qcow2 file")]
+    n4[("RAW file")]
+    n5[("Host block device")]
+    n0 -->|"block I/O"| n1
+    n1 -->|"VM boundary"| n2
+    n2 -->|"qcow2 backend"| n3
+    n2 -->|"RAW backend"| n4
+    n2 -->|"block-device backend"| n5